3.
[tex] \frac{3}{2} + \frac{3}{5} - \frac{1}{10} = \frac{15}{10} + \frac{6}{10} - \frac{1}{10} = \frac{15 + 6 - 1}{10} = \frac{20}{10} = 2[/tex]
4.
[tex] \frac{15}{24} \times 40 = \frac{15}{3} \times 5 = 5 \times 5 = 25[/tex]
5.
[tex]3 \frac{1}{5} \times \frac{25}{34} = \frac{3 \times 5 + 1}{5} \times \frac{25}{34 } = \frac{16}{5} \times \frac{25}{34} = \frac{5}{17} \times \frac{8}{1} = \frac{40}{17} [/tex]
